Ben is right. My Acura actually got the advertised mileage. If I really hammer down the pedal, which I did for a tank with mostly city driving, I got only 14mpg. The best tank I got was 26mpg which included 97% highway driving. But I did mostly city driving, which gave me a consistent 18mpg. Now, with my Accord, which is a 4-banger, I can get up to 38mpg on a tank of gas and still get around 25mpg mixed driving. If I really hammer down the pedal, The worst I got was 19mpg, which is not bad at all.
Plus on top of all things, the TL required 91octane or higher so I must get premium gas. At the time, the price for premium gas was hovering $3.50 a gallon so that is the reason why I had to sell it.